To grow vegetables in water from a fish pond full of nutrients might sound like a brilliant idea, but is it really profitable? A study by reaearchers from the Wageningen Univesity showed that more than half of the 1000 commercial aquaponic farms worldwide make a loss. This was mainly the result of low market value for the produced vegetables and fish that were farmed. Before starting an aquaponics farm it is important to look at the market prospects. A niche in the market needs to be found that could make aquaponics more profitable. Tilapia and catfish usually won’t make it because they sell for far to cheap. Perch, burbot and pike could be interesting alternatives for the European market as their market value is much higher.
The Anammox process was developed by the Technical University of Delft and is an innovative treatment process for the removal of ammonium from wastewater. It is a shortcut in the nitrogen cycle in which ammonium is directly converted into nitrogen gas. The Anammox process occurs within one of the many granules present in the reactor. Half of the ammonium is oxidized into nitrite by nitration bacteria. Subsequently, Anammox bacteria convert the nitrite and the rest of the ammonium into nitrogen gas. The whole process takes place in one reactor which makes the Annamox process very compact. In conventional methods, at least two reactors are needed for the nitrification and denitrification steps. Another advantage of the Annamox process is that far less oxygen is required to drive the conversion of the ammonium, which substantially reduces the overall treatment cost. Anammox treatment is particularly suited for industrial wastewater high in ammonium content 🙂